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page.metaDescription=The official site for the Android Open Source Project.
Copyright 2015 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.
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<h1 itemprop="name" style="margin-bottom:0;">Welcome to the Android Open Source Project!</h1>
Android is an open-source software stack for a wide range of mobile devices and a corresponding open-source project led by
Google. Here you can find the information and source code you need to learn more about the Android platform. From there you can
create custom variants of the Android software stack, port devices and accessories to the Android platform,
and ensure your devices are compatible with the Android compatibility definition.
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<h3>What's New</h3>
<a href="{@docRoot}devices/tech/debug/dumpsys.html">
<h4>Example Dumpsys Diagnostic Output</h4></a>
<p>In addition to the aforementioned <strong><a
Diagnostics</a></strong>, you can now find Dumpsys examples of usage
data for <strong><a href="{@docRoot}devices/tech/ram/procstats.html">RAM
(procstats)</a></strong>, <strong><a
href="{@docRoot}devices/tech/netstats.html">network (netstats)</a></strong>,
and <strong><a
href="{@docRoot}devices/tech/power/batterystats.html">battery (batterystats)</a></strong>.</p>
<a href="{@docRoot}devices/audio/latency_measurements.html">
<h4>Audio Latency Measurements</h4></a>
<p>The Android audio team has published <strong><a
href="{@docRoot}devices/audio/latency_measurements.html">round-trip audio latency
measurements</a></strong> for select Nexus devices to help partners compare their
own devices and reduce latency further.</p>
<a href="{@docRoot}devices/tech/power/index.html">
<h4>Power Profile Details</h4></a>
information has been moved and expanded to include details on
<code>cpu.awake</code> and <code></code>. The need to create a
<code>power_profile.xml</code> file is also emphasized throughout.</p>
<a href="{@docRoot}source/initializing.html">
<h4>Initializing Improvements</h4></a>
<p>Build environment <strong><a
instructions now explain how to resize and unmount Mac OS sparse
images. And the ccache section has been moved to an optional <strong><a
a build environment</a></strong> section.</p>
<a href="{@docRoot}devices/tech/security/selinux/index.html">
<h4>SELinux Permissive Declarations</h4></a>
<p>SELinux <strong><a
and <strong><a
instructions have been updated to recommend using permissive declarations
directly as <code>permissive_or_unconfined()</code> has been deprecated.
Similarly, <code>BOARD_SEPOLICY_UNION</code> has been removed, so
<code>BOARD_SEPOLICY_*</code> variables are suggested insead.</p>
<a href="{@docRoot}devices/bluetooth.html">
<h4>Android 5.0 Bluetooth HCI Requirements</h4></a>
Host Controller Interface (HCI) requirements</a></strong> to leverage
the Bluetooth Low Energy APIs in Android 5.0 have
been published and linked from the <strong><a
href="{@docRoot}devices/bluetooth.html">Bluetooth</a></strong> introduction.</p>
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<h3>Getting Started</h3>
<a href="{@docRoot}source/index.html">
<h4>Explore the Source</h4></a>
<p>Get the complete Android platform and modify and build it to suit your needs. You can
also <strong><a
to</a></strong> the <strong><a
href="">Android Open Source Project (AOSP)
repository</a></strong> to make your changes available to everyone else
in the Android ecosystem.</p>
<a href="{@docRoot}source/index.html"><img border="0" src="images/android_framework_small.png" alt="Android framework summary" style="display:inline;float:left;margin:5px 10px"></a>
<a href="{@docRoot}devices/index.html">
<h4>Port Android to Devices</h4></a>
<p>Port the latest Android platform and
create compelling devices that your customers want.</p>
<a href="{@docRoot}accessories/index.html">
<h4>Build Accessories</h4></a>
<p>Sometimes, a device can't do it all. Tap into Android's open accessory standard and build accessories to complement the wide variety of Android-powered devices.</p>
<a href="{@docRoot}compatibility/index.html">
<h4>Get Compatible</h4></a>
<p>Being Android-compatible lets you offer custom features but still give users and developers a consistent
and standard experience across all Android-powered devices. Android provides guidance
and a test suite to verify your Android compatibility.</p>
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<h4>Help this Site</h4></a>
<p>Please note, is maintained in the Android Open Source Project. See the <strong><a
project log in AOSP</a></strong> for the complete list of changes to this site.
Contribute your own updates to that same project and help maintain</p>